How much loss of bone in my face after full mouth extractions?

The most common cause of bone loss is tooth loss left unreplaced, especially multiple teeth. Jawbone is preserved through the pressure and stimulus of chewing. When that is removed through tooth loss, the bone “resorbs” (reabsorbs) into the body. In the first year after tooth extraction 25% of bone is lost, and this bone loss continues on.

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so what is your question?